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LG's E900 and E720 handsets hit the FCC, one with AT&T-compatible frequencies

We knew LG's C900 QWERTY-packing Windows Phone 7 handset was sliding towards an AT&T finish line, but it's looking like the company's E900 slate phone might play for Team Blue as well -- here's an FCC report (the third Federalscoop in an hour!) that shows the handset boasting GSM 850 and 1900 radio frequencies as well as compatible 3G data. You can also expect Bluetooth and 802.11 b/g/n 2.4GHz WiFi alongside that 1GHz Snapdragon SoC when or if the handset hits US shores. We don't know nearly as much about the Android-based LG E720 (which apparently just popped in for a quick Bluetooth test) but a filing suggests it might not be destined for the US -- unlike with the E900, there's no mention of WCDMA 850, 1900, or AWS for 3G data, only the comparatively slow EDGE.